Synonyms|3.2kAntonyms|1.3k|Broader|61Narrower|58Related|3.9k

1,185 entry under adjective topic. ×

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banal(set, hard, weak, simple)
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bovine(careless, stupid, impassive, unresponsive)
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brainless(simple, slow, silly, foolish)
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clouded(obscure, dark, gloomy, dim)
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cold(calm, tough, severe, flat)
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comatose(slow, careless, relaxed, heavy)
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feeble-minded(simple, ability, slow, offensive)
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half-witted(simple, ability, slow, offensive)
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lazy(slow, careless, relaxed, indifferent)
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lumpish(slow, heavy, sluggish, impassive)
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mute(verb, calm, quiet, reduce)
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shadowy(weak, soft, gentle, obscure)
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soft(quiet, increase, light, weak)
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still(verb, calm, quiet, flat)
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sunless(dark, gloomy, dim, black)
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tasteless(hard, weak, flat, rough)
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tired(set, beat, hard, weak)
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unfeeling(noun, calm, tough, severe)
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unresponsive(calm, quiet, flat, slow)
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weary(verb, sluggish, upset, reduce)
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ChicagoSmart Define. 2016. "dull thesaurus" https://smartdefine.org/dull/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2016, dull thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/dull/thesaurus/synonyms>.
MLASmart Define. "dull thesaurus" 29 March 2016. Web. 25 September 2026. <https://smartdefine.org/dull/thesaurus/synonyms>